321443605464 has 64 divisors (see below), whose sum is σ = 820877522400. Its totient is φ = 104855801856.

The previous prime is 321443605387. The next prime is 321443605471. The reversal of 321443605464 is 464506344123.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169992 + ... + 819624.

Almost surely, 2^321443605464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321443605464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410438761200).

321443605464 is an abundant number, since it is smaller than the sum of its proper divisors (499433916936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321443605464 is a wasteful number, since it uses less digits than its factorization.

321443605464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650084 (or 650080 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

Adding to 321443605464 its reverse (464506344123), we get a palindrome (785949949587).

The spelling of 321443605464 in words is "three hundred twenty-one billion, four hundred forty-three million, six hundred five thousand, four hundred sixty-four".